QMS 860, User Manual, Page: 19 / 398

■ Simultaneous Interface Operation (SIO)
Gives you the ability to have more than one computer
printing to the printer simultaneously. Although many
other printers have multiple interface ports and
automatically designate a “hot port,” only one port actively
receives data at a time. Your QMS 860 Print System is
unique bec ause S IO a llows all three interfa ce
ports—AppleTalk, parallel, and serial—to be active and to
receive data at the same time.
You can have more than one computer printing to the
printer. Each interface has an input buffer (which may be
expanded with additional memory) that receives data
while another interface is being used to print. See chapter
3, the “Simultaneous Interface Operation (SIO)” section,
for more information.
The multiple interfaces let you connect to any IBM PC
compatible or Macintosh. The printer also works in many
mainframe computer and minicomputer environments.
■ Crown Architecture
Uses the QMS Crown multitasking operating system that
provides faster processing speeds, networking capability,
and higher printer performance while maintaining
outstanding print quality.
■ 3 resident emulations
Supports printing in HP PCL 4, HP-GL 7475A/7550A, and
PostScript Level 1 compatibility mode and PostScript
Level 2 emulations.
Chapter 1
I n t r o d u c t i o n 1 - 3